This is an Image & Text block. Click on this text to start editing and enter your own text with some basic formatting. Just click anywhere outside the text box when you're done to continue working on the rest of your page.
Elements like this introductory text can often be hidden in the block settings
A collection of icon and text items that can be added, removed and reordered.
You can drag any of these items to change the order in which they appear.
To add additional items, use the + button to the right of the final item.